Mechanism for controlling the stroke of the bore and stupfel apparatus in embroidery machines



Patented Aug. 18, 1925.

STATES:

PA'rENr ortica.

soHArr, on PLAUEN, sAXoNY, GERMANY.

MnoHANisivi non coNTnoLLiNef Tian ernennen; Tini Bonn AND smnrrnn.

APPARATUS 1N nivinnoinniw MACHINES.

Application led September 22, 1921. Serial No. 502,491'.

To all whom it may concern! Y Be it known that I, MAX RICHARD Bri-ir soriNniDnR, a vcitizen of the Republic of Ger# many, residing at Plauen, in Saxony, Germany, have invented certain new and useful Improvements in Mechanism for Control# ling the Strokeof theBore and Stupfel' Apparatus in Embroidery hllachines, of which the following- Aisa specification.

The present invention relates to multiple needle embroideringmachines and particularly to mechanism for voperatingv auxiliary adjustment is required. Vith embroider ingmachinesof theautoma'tic type, that is,

where theVA operation "is controlled through,

the jacquard, the control of the piercing` depth" ofthe borers4 and stupfels is effected by thejacquard card. l j

Heretofore the adjiistmentof the ydepth of penetration of the borers and stupfels has been generally effected by a mechanismcom# prisin'g rods connected tothe borers and stupfels and which are guided by a block or theV like' adjustably borne in a rocking" cam. The rocking inovemeintof said cam is mechanicallyleffected from the cams operating the' borers and stupfels. The amplitude of thefinovement of said rocking cam is varied by the' adjustment of [said block in said rocking cam, whereby the stroke" of the borers and' stupfels is adjusted. s Such mechanism,` however, is objectionable for various reasons. When the borers and stupfels are onlyseldom used, the partsr operating or controlling` the same are idle" during the major `part of the operatingI period of the machine'and as a result become clogged with dust, ibre or the like, that, when the implements are set in motion, offer considerable resistance, causing often a complete breakdown of the jacquard orother mechanism oran interruption of the operation of' the machine. Another drawback of said mechanism resides in that the displacement of theblock in the rocking` element or cam,

. operatesy ai'ocking bell-crank 4L, 5.

duringA the adjustment, does not occur quickly and smoothly, but is rather slow and jerky.

These drawbacks are completely obviated bythe present invention whose characteris`- ticfjfeature'consists in thatthe adjustment of the'strok'e can be effected, while the ma* chine is in operatiomby a system of links,

which afford easy manipulation under all conditions, addingfconsider'ably to the safety of the operation, because the same require much less power for their operation, than.

the displacement of theinember within the rocking element.

In" the accompanying' drawing, one ein! bodiment of my inventionl is illustrated in a diagrammaticview, only so much of the machine being" shown as is necessary for a' clear understanding of the invention.

Since identically the saine mechanism is used 'for'both kinds of implements, I shall in the' 'following describe a mechanism usedY in connection' with one kind of implement,

say the borersj Let a denote the fabric, which, asjusual, is stretched in a vertical plane and `Zidenote one of a set of auxiliaryimplements, say a borerl It is understood that with multiple needle .embroidering machines having` about 1,000

needles,` a longrowy ofborers is provided, the'latter beingfixed to a horizontal reciproeating carrier or bar c whose operation is to becontrolled either by hand (inpantograph machines) or by a jacquard mechanism in the'automatic machines. Y

Accordingto my invention, the mechanism 'reciprocating the bar c for control'- ling the'stioke of penetration of the imple-Q ments is constructed as follows z--Mounted on thedriven shaft l, is a cam disc 2, which The latteris` fulcrumed at 3 to a stationary part of the" machine (not shown) and has one of itsiarins, say 5, pivoted to oneend of a bar 6,'the other end of which is pivoted tothe lower end of a bar 7. The other end of said bar 7 is pivotally' connected at 7 to a be`ll-crank 8, 9 fulcriimed at 22 to"a stationary part of the machine (not shown) and connectedto the bar o'carryingthe implements. The operation ofthe cam 2 will effect a horizontal reciprocatory movement of the bar c through the bell-crank 4l, bars 6 and 7 and bell-crank 8, 9, and according to the adjustment of the str-oke of said reciprocating movement, the implements will penetrate the fabric to a greater or lesser extent or remain outside of the fabric, when their operation is not desired, carrying out a short idle toand-fro motion.

The adjustment of the stroke of the reciprocating movement of the implements, according` to this invention, is effected by the following mechanism A pair of arms or links 11, 12 of equal length are connected by a common pivot 1li to an adjustable member to be later described. The opposite end of one of the links, say 11, is pivoted to the bar 6 at 10 and the opposite end of the other link 12 has a fixed pivot 13 provided in a stationary part of the machine (not shown). rlhe member 15 carrying the common pivot 14- of the arms 11, 12 is pivcted at 15 to one end of a rod 17, whose other opposite end is screwthreaded, as at 1G, and works in an internally threaded sleeve 18, which is rotatively mounted in brackets 19 and to which a rotary motion is imparted by apair of bevel gears 20, 21 controlled either by hand or ajacquard mechanism (not shown). By virtue of the screw 1G and sleeve 18, the adjustment of the links 11, 12 will be uniform and continuously gradual to effect a corresponding adjustment of the strokes of the implements during the operation of the machine.

The mode of operation is as follows `When the pair of links 11 and 12 are in alignment with one another, that is, their separate pivots 10 and 13 in axial extension of one another, as shown by full lines in the drawing, the operation of the cam 2 will cause the bar c to practically remain at rest, or carry out a slight to-andfro motion, and the implements carried thereby will not penetrate the fabric, as the bar 6, while reciprocated, is only slightly displaced in vertical direction from the full line position into the dotted line position indicated by 6". lVhen, while the links 11, 12 are in this position, the rod 17, through the operation of the sleeve 18, by the gears 20, 21, is displaced longitudinally to the right, the common pivot 14 will be moved from its full line position toward the dotted line position indicated by 14X, the link 12 assuming the dotted line position 12 as a result of which, during the operation of the bell-crank 4i, 5, the bar 6 will be caused to rise into the dotted line position indicated by 6 and the link 11 into the dotted line position 11, correspondingly changing the stroke of the carrier c and of the implements thereon.

It will be understood that by virtue of this mechanism, only a slight force will be required to change the stroke of the implements, and that the adjustment will be gradual and uniform and can be effected quickly and smoothly without interrupting the operation of the machine. It is also to be noted that inasmuch as the alignment of links 11, 12 concurs with the end of the outward stroke of the implements, a short period of time is aorded for the change of stroke notwithstanding the continuation of the operation of the machine.

What I claim is 1. In an embroidering machine, the combination with an auxiliary implement carrier and a continuously driven means reciprocating said carrier, of means capable of effecting uniform and gradual changes of the stroke of the reciprocatory motion of said carrier to correspondingly vary the depth of penetration of the implements thereon, during the operation or the machine, said means including a pair of links having a common adjustable pivot and which at the end of the outward stroke of said carrier are adapted to be in alignment with one another.

2. In an embroidering machine, the combination with an auxiliary implement carrier, of a driven rocking member, means operatively connecting said member to said carrier to impart reciprocatory motion thereto and means for controlling` the stroke of said motion, comprising an adjustable member, a pair of links having a common pivot on said adjustable member and which at the end of the outward stroke of said carrier are adapted t0 be in alignment with one another.

3, ln an embroidering machine, the combination with an auxiliary implement carrier, of a driven rocking member, means operatively connecting said member to said carrier to impart reciprocatory motion thereto and means for controlling the stroke of said motion, comprising an adjustable member, a pair of links having a common pivot on said adjustable member and of which one has a fixed fulcrum and the other is pivotally connected to said rocking member, so that, at the end of the outward stroke of said carrier, said links will be in alignment with one another and the operation of the rocking member will not affect said carrier, and while in such alignment, said links can be adjusted to change the stroke of said carrier.

il. ln an embroidering machine, the combination with an auxiliary implement carrier, of a cam operated rocking member, means operatively connecting said carrier to said 'member to impart reciprocatory motion thereto and means for controlling jthe stroke of said motion, including a member capable lue of a uniform and gradual adjustment, an arm pivoted thereto at one end, a pair ol' links having a common pivot on the other end of said arm, one of said links having a fixedfulorum and thel other being pivoted to said first named means, so that at the end of the outward stroke of said Carrier, saidv 

